Reddish-brown vat dyes.



-15 as equivalent thereto.

UNITED STATES PATENT OFFICE.

OSCAR BALLY AND HUGO WOLFE, 0F MANNHEIM, GERMANY, ASSIGNORS TO IBA DISCHE ANILIN & SODA FABRIK, 0F LUDWIGSHAFEN-ON-THE-RHINE, GERMANY,

A CORPORATION.

REDDISH-BROWN VAT DYES.

Specification of Letters Patent. Patented )Iay 5, [91 -4.

Divided and this application No Drawing Original application filed December 9, 1911, Serial No. 664,865.

filed December 4, 1913. Serial No. 804,715.

tained by condensing halogen derivatives of di-arylsulfones with amino-anthraquinones, and also by condensing halogenated diarylmethane derivatives or halogenated fluore none derivatives with amino'unthraquinones.

We have now found that the condensation product obtainable from dihalogen-phenan threnequinone and two molecular proporand of which the following is a specification. tions of 1-amino-anthruquinonc, on being The specification of Patent No. 1,016,604 treated with a dehydrating agent, can be describes the manufacture of coloring matconverted into a coloring matter which dves ters by condensing halogenated ketones and cotton from a vat fast reddish brown shades diketones, such for instance as benzophenon, It is probable that during the reaction the benzil and phenanthraquinone, with amino elements of Water are removed and inner compounds 01' the anthracene series, Wherecondensation takes place, so that acridin by coloring matters are obtained which dye rings are formed. Thus the formation of cotton, from a vat, from red to violet-brown colorin matter can probably be represented shades. Similar coloring matters can be ohby the ollowing formulae:

To all whom it may concern Be it known that we, OSCAR BALLY and Huoo \VOLFF, citizen, respectively, of the Swiss Republic, and subject of the Grand Duke of Baden, residing at Mannheim, Germany, have invented new and useful Improvements in Reddisl1Brown Vat Dyes, which is divided out of our application for patent, Serial No. 664,865, filed December 9, 1911,

The coloring matters derivable as above dry, of brown powders which yield a browndcscrihed from homologues of l-aminoish red solution in concentrated sulfuric acid "nthruquinone possess very similar properand a brown solution in 23% fuming sult as to the coloring matter obtainable from furie acid. They yield violet vats in alka- ;omino-untln'aquinone itself, and for the line hydrosulfite solution and from these purposes of this invention can be regarded vats color cotton violet shades which, upon washin I and drying, become reddish brown.

The allowing example will serve to illus- Our new eolorin' matters consist when It is hereby certified that in Letters Patent No. 1,095,780, granted May 5, 191%, upon the application of 0508.! Bally and Hugo Wollf, of Mannheim, Germany, for an hnbrovement in ReddishBi-own Vat Dyes, an error nppearsin the printed specification requiring, vorreetion as follows: Page 1, left'lnmd forniuln, top line, in break insert the letters and sign C() CO; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the ease in the Patent Oliice.

Signed :unl senlml this 7th day of July A. '13., 19M.

[SEAL] R. F. YVHITEHEAD,

jlr'tl'u aumniew oner of Patent. 

